to whisper; to talk in a low voice; to murmur
教室里同学们都在认真学习，只有角落里几个同学在唧唧咕咕地讨论着什么。
In the classroom, all the students were studying diligently, except for a few in the corner who were whispering and murmuring about something.
Next Idiom
to whisper; to talk in a low voice; to murmur